package com.hubei.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "RoleFilter",urlPatterns = {"/*"})
public class RoleFilter implements Filter {
    public void destroy(){

    }
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        String url=request.getRequestURI();
        if (url.contains("login")){
            chain.doFilter(req,resp);
        } else{
            HttpSession session=request.getSession();
            Object user =session.getAttribute("userInfo");
            if(user==null){
                response.sendRedirect("./login.jsp");
            }else {
                chain.doFilter(req,resp);
            }
        }
    }
    public void init(FilterConfig fConfig) throws ServletException {

    }

}